Dust-catcher.



F. B. DAVIS.

DUST CATCHER.

APPLICAHON FILED APILZO, I916.

Patented Jan. 2, 1917.

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F. B. DAVIS.

DUST CATCHER.

APPLICATION FILED APR. 20, I916.

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FRANK '.B. DAVIS, 0F ERIE, PENNSYLVANIA.

DUST-CATGHER.

Specification of Letters Patent.

Patented J an. 2, 1917.

Application filed April 20, 1916. Serial No. 92,537.

To all whom it may concern:

Be it known that I, FRANK B. DAVIS, a citizen of the United States,residing at Erie, in the county of Erie and State of Pennsylvania, haveinvented new and useful Improvements in Dust-Catchers, of which thefollowing is a specification.

This invention relates to dust catchers and consists in certainimprovements in the construction thereof as will be hereinafter fullydescribed and pointed out in the claims.

More particularly the invention relates to dust catchers for abradingdevices, particularly such as are commonly used by dentists. In this usethe dust is usually gold and the loss of this dust is considerable.

The invention is illustrated in the accompanying drawings as followsFigure 1 shows a plan view of the device. Fig. 2 a side elevation of theright side of the device. Fig. 3 a front elevation of the device. Fig.41 an elevation of the left side of the device. Fig. 5 a front view ofthe device, the front plate being removed to show the. position assumedby the operator in using the device.

The dust catcher comprises a box formed of the back 1, front 2, bottom3, top 4, right side 5, and left side 6. The sides 5 and 6 have openings7 and 8 through them suitable for the introduction of the hands of theoperator. These are shaped so that the openings leave a margin of thesides 5 and 6 which in connection with the hands of the operator makes avery nearly complete closure of the box.

I have shown in Fig. 5 the position assumed when used in dentistry. Inthis the wheel 9 is held in the right hand of the operator and as shownis operating on a plate 10 held by the left hand of the operator. Itwill be understood that in the use of these devices at least for quite aportion of the work, the operator grinds and tries so that the operationmust be done at the operating chair. The abrasive wheel is small I sothat it can be operated at the top without obscuring the vision.

In order that the operator may readily observe the operation the box isformed with a transparent top 11. This is ordinary glass Copies 01' thispatent may be obtained for five cents each, by addressing the"Gommissioner of Patents;

which is slid into the top under the guides 12 and to more fullyilluminate the work a portion at least of the front is provided with atransparent plate 13.

It is sometimes desirable to use a magnifying glass as the operationproceeds and for this purpose a magnifying glass 14: is provided. Thisis supported by the posts 15 which extend into the round pockets 16 atthe rear corners of the box. If desired, one of the posts 15 may bescrew threaded at 17 and a thumb nut 18 provided for accuratelyadjusting the microscope.

As before stated, the device is used ordinarily by an operator at theside of the patient. In order to readily support the dust catching box ahook 19 is provided by means of which it may be hooked into the vest orother clothing of the operator so that it is in convenient position atall times for use.

What I claim as new is 1. In a dust catcher, the combination of a boxhaving an opening at each side thereof for the introduction of the handsof the operator with the operating tool at one side and the work at theopposite side; and a transparent closure for the top.

2. In a dust catcher, the combination of a box having an opening in theside thereof for the introduction of the hand of the operator with thework; a transparent closure for the top; and means for attaching the boxto an operator.

3. In a dust catcher, the combination of a box having an opening at eachside thereof for the introduction of the hands of the operator with theoperating tool at one side and the work at the opposite side; and atransparent closure for the top and-front.

41. In a dust catcher, the combination of a box having an opening ineach side thereof for the introduction of the hands of the operator withthe work with the operating tool at one side and the work at theopposite side; a transparent closure. for the top; means for attachingthe box to an operator and a magnifying glass above the transparent topand supported by the box.

In testimony whereof I have hereunto set my hand.

. FRANK B. DAVIS.

Washington, .D. G.

